TY - GEN AU - Shear,M TI - Paradontal disease as a phase in evolution. A hypothesis SN - 0011-8516 PY - 1966///1223 KW - Biological Evolution KW - Humans KW - Periodontal Diseases KW - Periodontium KW - anatomy & histology KW - Tooth N1 - Publication Type: Journal Article ER -